Jesus came to establish the Kingdom of God. But what exactly is the Kingdom of God? One way to see what Jesus meant by this is in opposition to the kingdom it came to replace, the Kingdom of Satan. What was Satan's kingdom like? It was the kingdom of sickness and disease, it was the kingdom of death. Death not meaning just the cessation of biological function but the absence of abundance of life. The TWOT (Theological Wordbook of the Old Testament) defines life this way:
TWOT 644 The OT speaks of life as the experience of life rather than as an abstract principle of vitality which may be distinguished from the body. This is because the OT view of the nature of man is holistic, that is, his function as body, mind, spirit is a unified whole spoken of in very concrete terms. Life is the ability to exercise all one's vital power to the fullest; death is the opposite. The verb haya, "to live" involves the ability to have life somewhere on the scale between the fullest enjoyment of all the powers of one's being, with health and prosperity on the one hand and descent into trouble, sickness, and death on the other.
Jesus came that we might have life and have it more abundantly. The Kingdom of God is the Kingdom of Life.